I feel I have to combat the only review of the current version that you will see. Look guys/gals this is an amazing app! I have many GPSrs and iPhone geoapps. This is the only one that lets me see off line where I am at 24k topo map scale and the topo maps are free! I was out today examining some small mountain roads and related entries to regional preserves. My Garmin 60CSx was loaded with the Garmin Topo USA series of 100k topo maps for this area. My 3rd gen iTouch with Magellan Toughcase was loaded with all the relevant 24k topo maps that I downloaded for free from iHike app. I used both simultaneously. The Garmin 100k scale maps did not show the small roads that were evident on the 24k scale topo maps of iHike. Both Garmin and iHike agreed on the total distance covered. Both Garmin and iHike exports agreed in route and distance when exported to Google Earth. Garmin does a better job in showing "true" elevation gain because it includes a barometric damper to the altitude variations from point to point tracking while my Magellan case does not.
Bottom Line: Use both because the free iHike 24k maps are really accurate compared to the Garmin 100k maps on your GPSr. Its like having a 24k topo GIS system in your car or backpack.
FWC about iHikeGPS : Classic Topo Maps, v3.4